CALET Observations during the First 5 Years on the ISS

CALET Collaboration

doi:10.1134/S1063778821130214

CALET Observations during the First 5 Years on the ISS

CALET Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

The CALorimetric Electron Telescope CALET is collecting science data on the International Space Station since October 2015 with excellent and continuous performance. Energy is measured with a deep homogeneous calorimeter (1.2 nuclear interaction lengths, 27 radiation lengths) preceded by an imaging pre-shower (3 radiation lengths, 1mm granularity) providing tracking and 10^-5 electron/proton discrimination. Two independent sub-systems identify the charge Z of the incident particle from proton to iron and above (Z<40). CALET measures the cosmic-ray electron + positron flux up to 20 TeV, gamma rays up to 10 TeV, and nuclei up to the PeV scale. In this paper, we report the on-orbit performance of the instrument and summarize the main results obtained during the first 5 years of operation, including the electron + positron energy spectrum and the individual spectra of protons, heavier nuclei and iron. Solar modulation and gamma-ray observations are also concisely reported, as well as transient phenomena and the search for gravitational wave counterparts.

Original language	English
Pages (from-to)	985-994
Number of pages	10
Journal	Physics of Atomic Nuclei
Volume	84
Issue number	6
DOIs	https://doi.org/10.1134/S1063778821130214
Publication status	Published - 2021 Nov

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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@article{6ccfa3e7954f46ae81cf41114d3517d7,

title = "CALET Observations during the First 5 Years on the ISS",

abstract = "The CALorimetric Electron Telescope CALET is collecting science data on the International Space Station since October 2015 with excellent and continuous performance. Energy is measured with a deep homogeneous calorimeter (1.2 nuclear interaction lengths, 27 radiation lengths) preceded by an imaging pre-shower (3 radiation lengths, 1mm granularity) providing tracking and 10-5 electron/proton discrimination. Two independent sub-systems identify the charge Z of the incident particle from proton to iron and above (Z<40). CALET measures the cosmic-ray electron + positron flux up to 20 TeV, gamma rays up to 10 TeV, and nuclei up to the PeV scale. In this paper, we report the on-orbit performance of the instrument and summarize the main results obtained during the first 5 years of operation, including the electron + positron energy spectrum and the individual spectra of protons, heavier nuclei and iron. Solar modulation and gamma-ray observations are also concisely reported, as well as transient phenomena and the search for gravitational wave counterparts.",

author = "{CALET Collaboration} and Marrocchesi, {P. S.} and O. Adriani and Y. Akaike and Y. Asaoka and E. Berti and G. Bigongiari and M. Bongi and P. Brogi and A. Bruno and N. Cannady and C. Checchia and Cherry, {M. L.} and G. Collazuol and Ficklin, {A. W.} and Guzik, {T. G.} and M. Ichimura and Israel, {M. H.} and K. Kasahara and Y. Kawakubo and Krizmanic, {J. F.} and Messineo, {A. M.} and Mitchell, {J. W.} and S. Miyake and M. Mori and N. Mori and Motz, {H. M.} and K. Munakata and L. Pacini and F. Palma and P. Papini and Rauch, {B. F.} and Ricciarini, {S. B.} and T. Sakamoto and M. Sasaki and F. Stolzi and A. Sulaj and T. Tamura and S. Torii and Wefel, {J. P.} and K. Yoshida and Zober, {W. V.}",

note = "Funding Information: We gratefully acknowledge JAXA{\textquoteright}s contributions to the development of CALET and to the operations onboard the ISS. We also wish to express our sincere gratitude to ASI and NASA for their support of the CALET mission. Publisher Copyright: {\textcopyright} 2021, Pleiades Publishing, Ltd.",

year = "2021",

month = nov,

doi = "10.1134/S1063778821130214",

language = "English",

volume = "84",

pages = "985--994",

journal = "Physics of Atomic Nuclei",

issn = "1063-7788",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "6",

}

TY - JOUR

T1 - CALET Observations during the First 5 Years on the ISS

AU - CALET Collaboration

AU - Marrocchesi, P. S.

AU - Adriani, O.

AU - Akaike, Y.

AU - Asaoka, Y.

AU - Berti, E.

AU - Bigongiari, G.

AU - Bongi, M.

AU - Brogi, P.

AU - Bruno, A.

AU - Cannady, N.

AU - Checchia, C.

AU - Cherry, M. L.

AU - Collazuol, G.

AU - Ficklin, A. W.

AU - Guzik, T. G.

AU - Ichimura, M.

AU - Israel, M. H.

AU - Kasahara, K.

AU - Kawakubo, Y.

AU - Krizmanic, J. F.

AU - Messineo, A. M.

AU - Mitchell, J. W.

AU - Miyake, S.

AU - Mori, M.

AU - Mori, N.

AU - Motz, H. M.

AU - Munakata, K.

AU - Pacini, L.

AU - Palma, F.

AU - Papini, P.

AU - Rauch, B. F.

AU - Ricciarini, S. B.

AU - Sakamoto, T.

AU - Sasaki, M.

AU - Stolzi, F.

AU - Sulaj, A.

AU - Tamura, T.

AU - Torii, S.

AU - Wefel, J. P.

AU - Yoshida, K.

AU - Zober, W. V.

N1 - Funding Information: We gratefully acknowledge JAXA’s contributions to the development of CALET and to the operations onboard the ISS. We also wish to express our sincere gratitude to ASI and NASA for their support of the CALET mission. Publisher Copyright: © 2021, Pleiades Publishing, Ltd.

PY - 2021/11

Y1 - 2021/11

N2 - The CALorimetric Electron Telescope CALET is collecting science data on the International Space Station since October 2015 with excellent and continuous performance. Energy is measured with a deep homogeneous calorimeter (1.2 nuclear interaction lengths, 27 radiation lengths) preceded by an imaging pre-shower (3 radiation lengths, 1mm granularity) providing tracking and 10-5 electron/proton discrimination. Two independent sub-systems identify the charge Z of the incident particle from proton to iron and above (Z<40). CALET measures the cosmic-ray electron + positron flux up to 20 TeV, gamma rays up to 10 TeV, and nuclei up to the PeV scale. In this paper, we report the on-orbit performance of the instrument and summarize the main results obtained during the first 5 years of operation, including the electron + positron energy spectrum and the individual spectra of protons, heavier nuclei and iron. Solar modulation and gamma-ray observations are also concisely reported, as well as transient phenomena and the search for gravitational wave counterparts.

AB - The CALorimetric Electron Telescope CALET is collecting science data on the International Space Station since October 2015 with excellent and continuous performance. Energy is measured with a deep homogeneous calorimeter (1.2 nuclear interaction lengths, 27 radiation lengths) preceded by an imaging pre-shower (3 radiation lengths, 1mm granularity) providing tracking and 10-5 electron/proton discrimination. Two independent sub-systems identify the charge Z of the incident particle from proton to iron and above (Z<40). CALET measures the cosmic-ray electron + positron flux up to 20 TeV, gamma rays up to 10 TeV, and nuclei up to the PeV scale. In this paper, we report the on-orbit performance of the instrument and summarize the main results obtained during the first 5 years of operation, including the electron + positron energy spectrum and the individual spectra of protons, heavier nuclei and iron. Solar modulation and gamma-ray observations are also concisely reported, as well as transient phenomena and the search for gravitational wave counterparts.

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U2 - 10.1134/S1063778821130214

DO - 10.1134/S1063778821130214

M3 - Article

AN - SCOPUS:85122258044

SN - 1063-7788

VL - 84

SP - 985

EP - 994

JO - Physics of Atomic Nuclei

JF - Physics of Atomic Nuclei

IS - 6

ER -

CALET Observations during the First 5 Years on the ISS

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